抗氧化剂二胺衍生物的合理设计使用定量结构-活性关系和量子力学计算
Ayokanmi Joseph Aremu1, Phiphob Naweephattana2, Ismail Dwi Putra3
1Program in Bioinformatics and Computational Biology, Graduate School, Chulalongkorn University, Bangkok, Thailand.
Journal of computational chemistry
|February 4, 2025
概括
这项研究结合了机器学习和量子力学,为制品设计了具有增强抗氧化性能的新型二胺 (DPA) 衍生物. 开发的模型准确地预测了抗氧化剂活性,指导了具有改善原子转移能力的强效化合物的合成.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学的计算化学
- 聚合物科学 聚合物科学
背景情况:
- 双胺 (DPA) 衍生物通过通过原子捐赠给过氧基来抑制自身氧化,在中起到抗氧化剂的作用.
- 八醇-水分区系数 (LogKow) 是预测水聚合物矩阵内DPA衍生物分布的关键指数.
研究的目的:
- 为了研究DPA衍生物的结构-活性关系,关于它们的抗氧化特性.
- 利用机器学习 (QSAR) 和量子力学 (QM) 来预测和设计具有增强抗氧化能力的新型DPA衍生物.
主要方法:
- 密度函数理论 (DFT) 用于优化DPA衍生物结构和分析分子性质.
- 量化结构-活动关系 (QSAR) 模型,特别是梯度增强回归器 (GBR) 模型,使用顺序重要性和SHAP分析来开发和验证.
- 进行了量子化学计算 (M062X/6-311++G(d,p) /M062X/6-31G(d,p)) 以确定抗氧化机制的键解离 (BDE) 和激活能量障碍.
主要成果:
- 对于LogKow.com,GBR模型实现了高预测精度 (R2=0.983,RMSE=0.642).
- 分子重量和电子特性被确定为影响LogKow的显著描述因素.
- 与现有化合物相比,设计的化合物D1和D2显示出预测的更高的LogKow值和更低的BDE,这表明抗氧化能力增强.
- 计算显示,原子转移是主要的抗氧化机制,D1和D2显示激活能量障碍明显较低.
结论:
- 整合QSAR和QM计算为设计具有卓越抗氧化特性的DPA衍生物提供了有效的策略.
- 设计的D1和D2化合物显示出在基于的应用中改善抗氧化活性的有希望的潜力.
- 这种方法促进了抗氧化剂的合理设计,使其具有针对特定材料应用的定制性质.
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